Re: rcu_preempt self-detected stall on CPU from 4.4-rc4, since 3.17

From	Peter Zijlstra <peterz@infradead.org>
Newsgroups	linux.kernel
Subject	Re: rcu_preempt self-detected stall on CPU from 4.4-rc4, since 3.17
Date	2015-12-11 12:40 +0100
Message-ID	<qEudl-3DB-49@gated-at.bofh.it> (permalink)
References	<qEtTY-3va-17@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Fri, Dec 11, 2015 at 10:17:33PM +1100, Ross Green wrote:
> I have been getting these stalls in kernels going back to 3.17.
> 
> This stall occurs usually under light load but often requires several
> days to show itself. I have not found any simple way to trigger the
> stall. Indeed heavy workloads seems not to show the fault.
> 
> Anyone have any thoughts here?

see lkml.kernel.org/r/564F3DCA.1080907@arm.com
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rcu_preempt self-detected stall on CPU from 4.4-rc4, since 3.17 Ross Green <rgkernel@gmail.com> - 2015-12-11 12:20 +0100
  Re: rcu_preempt self-detected stall on CPU from 4.4-rc4, since 3.17 Peter Zijlstra <peterz@infradead.org> - 2015-12-11 12:40 +0100

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